According to a Yale University study, one child is injured by a firearm every hour in the U.S. And 1.7 million kids live in a home with unlocked guns.

ABC News conducted a hidden camera experiment to see what a child would do in the presence of a gun -- and to explore just how these injuries can happen. Parents who claimed they have taught their kids about gun safety agreed to participate.

"I wish to God she had had an m-4 in her office, locked up so when she heard gunfire, she pulls it out ... and takes him out and takes his head off before he can kill those precious kids," Gohmert said of slain principal Dawn Hochsprung on <a href="http://www.huffingtonpost.com/2012/12/16/louie-gohmert-guns_n_2311379.html"><em>Fox News Sunday</em></a>. He argued that shooters often choose schools because they know people will be unarmed.